Vertically mounted to a dedicated test rig, the stroke is adjusted to the maximum, and a static pressure test load is applied for 4 h at the fast shift position.

Compliance requirements:

Check the stability of the support device, whether it can be self-locking and whether the parts are damaged or deformed.

2. Lift test

25 times 5 times

Vertically mounted to a dedicated test rig, 1.25 times the lift load is applied at the slow gear position, and the stroke is repeated 5 times from zero to maximum.

3.Lateral force test

≥6t

Vertically mounted to a dedicated test rig, applying a lateral load of not less than 6 tons on the axis of the foot pin shaft, and applying to the bottom leg of the footless pin, within 25 mm from the lower end of the inner leg (cannot be applied) On the foot, the linkage is carried out separately on each leg.

Compliance requirements:

The shift position is slow and the legs should work normally to check whether the parts are damaged or deformed.

4.Durability test

0.54×MGW200 times

The elongation was 127 mm without load, and then the elongation/shortening was 76 mm under the load of 0.54 × MGW, and the operation was repeated 200 times.

Compliance requirements:

The shift position is slow and the legs should work normally to check whether the parts are damaged or deformed.